Large Scale Central

OLOMANA (LGB 22130) - How do you remove the motor?

We have a 1994 vintage LGB 22310 Olomana. The motor recently stalled out after a couple hours gracing the garden. I picked Olomana up a couple years back when she came up for sale used. I had a few moments to crack open Olomana this morning and found:

a.) The previous owners lived even nearer to the beach than we do:


b.) There is some sort of loose spring up by the brushes (near the tip of the screw driver):

c.) No amount of fiddling could pop out the motor!

I tried wiggling back and forth to no effect, getting a screw driver between the motor and the chassis with the same results, and trying to pop it out after removing the gear box from the motor frame. Is there a trick to this?

Also, what is the best way to clear out the sand? I am assuming there is something in which to soak the gears and drive belts.

Finally, I noted from TrainLi’s site that the motor for this model changed in the late '90s. Does anyone know off hand if the new one is incompatible with the older frame?

I’d prefer to clean the gear box, buy and install a new motor and get Olomana back on the rails, but, if that would require some specialty tool or arcane procedure, I am also happy to just send it in to TrainLi. Given my past track record, that could prove cheaper (if less instructive!) over the long haul!

Thanks,
Eric

Yes, google?
https://www.manualslib.com/manual/1256208/Lgb-22130.html?page=5

From that manual:
"Hint:
The screws used in the gearbox are different sizes. For
proper reassembly, note the location of each screw.
- Remove the trailing axle by removing the small pivot screw
in the center of the axle arm.
- Remove the rear gearbox bracket by removing two screws.
- Remove the large screw at the front of the gearbox.
- Remove the bottom of the gearbox by removing five small
screws.
- Replace the motor, wheelsets, pick-up shoes or brushes.
- Reassemble"

And then there’s this:
https://largescalecentral.com/t/i-want-to-grease-this-lgb-loco/80757/7

Should give you some fun reading for the weekend!

I would try soap and water, once the motor is out - then a good drying and lots more oil and grease?

Thanks, @PeterT . I found and printed an exploded parts diagram, too. I thought I had that chassis pretty well stripped down. Mabe I missed something. I’ll take another crack tomorrow.

Eric

Update:

Turns out the key was to push the wires off the circuit board just forward of the gear box. These wires are thick, well soldered, and, best of all, use “friction hold” connectors. With that off, I was able to put pressure evenly around the gear box frame and pop out the motor. I love the fact that LGB seems to have repairability designed into their models.

Sure enough, the issue was the brush spring.

To confirm that my diagnosis was correct, I hooked a 9 volt battery to the motor poles, pushed the negative brush in with a screwdriver, and watched the motor spark to life. Unfortunately, no amount of fiddling could get that spring to reseat. Studying the positive pole provided limited insight. The hook apparently latches into the framing around the carbon brush. Perhaps that had snapped off on the negative side? The brushes also look to be half gone, so maybe the spring had lost elasticity to hold it in place as the brush wore away? No clue. I passed this part of electrical engineering through rote memorization and moved on with my life 30 years ago…

I don’t have the tools to pry open the motor can for an attempt at reseating the spring, so the plan is to save myself the aggravation and buy a new motor. I can then experiment away to my heart’s content with this thing while enjoying something actually prototypical to not just Hawaii but almost to my neighborhood cut circles in the garden.

Time to inventory my parts needs and make my semi-annnual parts order from TrainLi!

Have a Great Week!

Eric

Update:

I confirmed the part number and placed my order with TrainLi. Olomana will again grace the rails!

Eric